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Figure 2-1. Typical Packaging Diagram | Up
TM-5-6675-238-14 Theodolite: Directional: 0.002-MIL Graduation: 5.9 In. Long Telescope Detachable Tribrach: w/Accessories and Tripod Manual | Next
Figure 3-1. Signal Processor Unit Controls, Indicators, and Connectors |
ARMY TM 5-6675-238-14
MARINE CORPS TM 08839A-14/1
CHAPTER 3
OPERATING INSTRUCTIONS
Section I. CONTROLS AND INSTRUMENTS
3-1. General. This section describes the function of the
3-3. Controls and Indicators. The PADS test set con-
PADS test set operator controls and indicators.
trols, indicators, and connectors are illustrated in figures
3-1 thru 3-3. Table 3-1 lists the contros, indicators, and
3-2. Damage from Improper Setting. No combination
connectors with functional descriptions.
of control settings will cause damage to equipment or
create hazard to personnel.
Section Il. OPERATION UNDER USUAL CONDITIONS
3-4. General. The PADS test set is operated normally to
test and troubleshoot the PADS computer, CDU, and
IMU and to perform a self-test of the test set. Operation
for performing test and troubleshooting procedures on
the PADS equipment is contained in the PADS mainte-
nance manual TM 5-6675-308-34 or TM 08837A-34/
2). A teletypewriter is used with the PADS test set
during testing and troubleshooting of the PADS. For
complete operation of the teletypewriter, refer to chap-
ter 9 and TM 11-5815-200-12. Under normal conditions,
self-test of the PADS test set should be performed after
installation, monthly when in continuous use, before
each PADS test when used every other day, or when the
PADS test set operational status is questionable. The
following paragraphs contain operating procedures for
preparing the PADS test set to run the self-test proce-
dure contained in chapter 8.
3-5. Operating Procedure. Since the PADS test set is a
special purpose test set, the operating procedures are
included with the test procedures for the PADS com-
puter, CDU, and IMU in TM 5-6675-308-34 or TM
08837A-34/2. In addition, turnon and turnoff of the
PADS test set is included in the test procedures in this
manual.
3-6. Tape Reader, Part No. 877406-1, Tape Loading.
See figure 3-2 and perform the following:
Do not physically restrain the tape reader
tape reel from turning. Do not use any
kind of adhesive tape to hold the tape
onto the reel being loaded. Do not use
deformed tape reels. Severe damage to
the tape reader servo cards may result.
a. Ensure that tape reader SPOOLING switch is
set to DISABLE.
b. Install self-test tape (left) and take-up reel (right)
and fasten reel locking clips.
c. Route self-test tape carefully as shown in figure
3-2.
3-6.1 Tape Reader, Part No. 877406-2, Tape Loading.
See figure 3-2.1 and perform the following:
a. Lift read head cover to up position.
b. Load self-test tape on left side, thread tape
through read head ensuring that tape is between LED’s
and read head, and sprocket teeth are aligned on both
sides.
c. Manually move tape until arrows on tape are
past read head.
d. Gently lower read head cover. Tape reader has
now recorded this as HOME.
e. Wrap tape around take-up reel. Ensure that tape
has been threaded as shown in figure 3-2.1.
3-7. IMU/Computer/CDU Testing Concepts. T he
PADS test set is utilized to check out the PADS on a
system level as well as checking out the IMU, com-
puter, and CDU on an individual basis with an opera-
tional PADS power supply and teletypewriter con-
nected. To perform IMU and CDU checkout, an opera-
tional computer, power supply, and teletypewriter must
be connected to the PADS test set. The computer is
tested by loading a diagnostic program into the com-
puter memory, then performing the necessary tests, the
results of which are printed out on the teletypewriter.
During computer testing a malfunction can be isolated
to a plug-in module. In addition, the PADS test set is
Change 1
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